Hardened Washers
Hardened Washers - Related Videos
10:09
Tests of Hardened Concrete in Tension
0 Views •
2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA In a previous laboratory focused on concrete in compression, we observed that concrete can withstand very large stresses under uniaxial compressive forces. However, the failures observed were not compressive failures but failures along shear planes where maximum tensile forces occur. Thus, it is important to understand the behavior of concrete in tension and particularly its maximum strength...
08:08
Compression Tests on Hardened Concrete
0 Views •
2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA There are two distinct stages in a construction project involving concrete. The first stage involves batching, transporting, and casting fresh concrete. At this stage, the material is viscous, and the workability and finishability are the key performance criteria. The second stage occurs when the hydration process begins shortly after the concrete is placed in the form, and the concrete will...
00:52
Washing, Drying, and Ignition of Precipitates
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2024
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
06:46
Pulsed Laser Diode-Based Desktop Photoacoustic Tomography for Monitoring Wash-In and Wash-Out of Dye in Rat Cortical Vasculature
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Cited by 9 •
2019
A compact pulsed laser diode-based desktop photoacoustic tomography (PLD-PAT) system is demonstrated for high-speed dynamic in vivo imaging of small animal cortical vasculature.
07:06
Preparation of Washed Human Platelets for Quantitative Metabolic Flux Studies
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2025
Platelet metabolism is of interest, particularly as it relates to the role of platelet hyper- and hypoactivity in bleeding and thrombotic disorders. Isolating platelets from plasma is necessary for some metabolic assays; presented here is a method for isolating of intracellular metabolites from washed platelets.
FAQs
Heat treatment increases the washer’s hardness, so the material is less likely to indent or deform when clamping force is applied. That matters because deformation can alter how force is carried through the joint. By resisting this change, hardened washers help maintain more consistent preload in demanding bolted connections.
A broad bearing surface spreads clamping force across more of the connected material instead of concentrating it beneath the fastener. This distribution helps protect joint surfaces from embedding and mechanical damage. The resulting support contributes to a more stable connection, particularly where the joint experiences substantial loads or repeated loading.
Their resistance to indentation, deformation, and wear helps the washer retain its supporting function as the joint experiences vibration or repeated loading. When paired with high-strength fasteners, they help preserve more consistent preload and limit damage at the bearing surfaces. These effects improve connection reliability during demanding service.
Place the washer beneath the bolt, nut, or screw head so its bearing surface supports the fastener interface with the connected material. This arrangement distributes clamping force and helps prevent the fastener from embedding into the joint surface. In engineering assemblies, the washer is commonly paired with a high-strength fastener.
Engineers use them when a bolted joint must tolerate demanding loads, vibration, or repeated loading while limiting surface damage and deformation. Supported applications include structural steelwork, heavy machinery, automotive assemblies, and equipment exposed to those conditions. Their use is especially relevant when maintaining reliable preload is important to connection performance.
By supporting the fastener and protecting the joint surface, hardened washers can help maintain clamping performance over the service life of a connection. Their resistance to indentation and wear contributes to improved reliability, longer service life, and reduced mechanical damage. These outcomes make them relevant to both structural and machinery-focused engineering assemblies.